More than 80% of people living in urban areas who monitor air pollution are exposed to air quality levels that exceed limits defined by the World Health Organization (WHO). Although all regions of the world are affected, populations in low-income cities are the most impacted. According to average annual levels of fine particulate matter (PM2.5, ambient particles with aerodynamic diameter of 2.5...

Lanzhou is one of the most polluted cities in China. Sulfur dioxide (SO2) concentrations have shown evident seasonal variability. Pollution was generally within the second-level criterion (b0.15mgm) in spring, summer, and fall but wasmuch higher than the second-level criterion and sometimes reaches mid-level pollution (APIN200) in winter. Meteorological conditions (low winds, stable stratificat...

abstract by using cross-section data which gathered through a survey research in mashhad ,contingent valuation approach and tobit model this study tries to determine economical value of air pollution and effective factors on wtp. based on contingent valuation approach, air pollution total value of airpollution in high-polluted region equals 7134146560 rials per month and in middle-polluted regi...

Exposure to elevated air pollution levels can aggravate pollen allergy symptoms. The aim of this study was to investigate the relationships between airborne birch (Betula) pollen, urban air pollutants NO2, O3 and PM10 and their effects on antihistamine demand in Gothenburg and Malmö, Sweden, 2006-2012. Further, the influence of large-scale weather pattern on pollen-/pollution-related risk, usin...

In recent years, severe and persistent air pollution episodes in China have drawn wide public concern. Based on ground monitoring air quality data collected in 2015 in Chinese cities above the prefectural level, this study identifies the spatiotemporal variations of air pollution and its associated driving factors in China using descriptive statistics and geographical detector methods. The resu...

Even though the air quality has been improving since the beginning of the 1980s, Cracow still belongs to the most polluted cities in Poland. The air pollution originates mainly from industry, small-size emission sources and transport. Metals in ambient air have been monitored since 1992 by 4 stations located within the city. The aim of the study was to determine the city areas where the nationa...

Air pollution caused by atmospheric particulate and gaseous pollutants has drawn broad public concern globally. In this paper, the spatial-temporal distributions of major air pollutants in Shenzhen from March 2013 to February 2014 are discussed. In this study, ground-site monitoring data from 19 monitoring sites was used and spatial interpolation and spatial autocorrelation methods were applied...

An air pollutant is known as a substance in the air that can cause harm to humans and the environment. Pollutants can be in the form of solid particles, liquid droplets, or gases. In addition, they may be natural or man-made. Pollutants can be classified as either primary or secondary. Air pollution, both indoors and outdoors, is a major environmental health problem affecting everyone in develo...